I ran .75 for about 2 months before upgrading to .99. Let me tell you straight up. .99 is not going to result in ANY dramatic increase in operational speed. Your Storm will still run at speed you are accustomed to. The .99 OS is only going to fix certain aspects such as orientation, camera functioning, etc. The Storm operation is not going to speed up.

Additionally, Slacker is a battery hog and will slow your phone down if you leave it running in the background when you aren't using it. Close the application when you aren't using it, as well as any other application.

If you need .99, Google it or surf around Crackberrydotcom. It's out there.

My Storm was running fine with .75. Have you tweaked your keyboard settings and turned on Memory Cleaning? Those two actions will stablize your Storm and make it run better. I also find that clearing the Event log and doing a battery pull every couple days keeps the Storm running well.

I resisted loading the beta but ultimately did it after becoming more familiar with the BB world. You sound like you are where I was at when I first got my Storm. I am being totally honest with you. Loading a beta is not going to give you the effect you are expecting.